Sanding machine



E. R. YOUNG SANDING MACHINE Sept. 18, 1928. 1,684,464

Filed June 20, 1927 3 Sheets-Sheet 1 Sept. 18, 1928.

E. R. YOUNG SANDING MACHINE 3 Sheets-Sheet Filed June' 20 1927 E. R. YOUNG SANDING MACHINE Filed June 20, 1927 3 Sheets-Sheet Patented Sept. 18, 1928.

UNITED STATES EN FI I i,

E RL O BELOIT, WISCONSIN; essxenon me YATES-AMERICAN MACHINE s COMPANY, OF BELQI'E, W'ISOONSIN, 1}; QQR'EDRATION- DELA'WARE;

SANDING MAG HJ NEQ Applica n fi Jun 20,

high grade of product is comparatively read- I ily produced with facflity and ithout especialsl ill .on the part ofthe operator.

Other desirable advantages, both struc el and func ional, r su ti g fro th mployment of the invention will be made clear to those skilled in this art from an understanding of a present preferred embodiment of the invention illustrated in the accornpanying drawings forming a part of this specification and throughout the viewsflot which like reference numerals have been used to, designate the same structural elements.

In these drawings: a r Figure 1 is a trontlelevat ion of the improved machine; 1 Figure 2 .is an enlarged, ragmentary elevation of the central part of the appliance; Figure 3 is a plan of the structure shown in Figure 2 with'some parts bro e away;

Figure 4 is an end-elevation of the construction .presentedin Figures 2 and- 3;

Figure 5 is a vertical cross-section on line 5--5,0.f Figure-2;,and i 1 v Figure 6 is a lengthwise section-on line 6l.61of Figure 4.

able frame '10 between the spaced standards 11, Hot which a work-table 12 lisadapted to travel forwardlyand rearwardly by means of carrying-Wheels 13, 13 designed to rollon parallel tracks 14, 14 mounted vertically-51th justably in anyapproved manner on the inner sur faoesoif such standards, thetable havingka front'handsrail 15 bymcans of which itmaybe easily slid'ba'ckward and forward to :shift the work resting on the table into Referring tothese drawings it will be peiy ceived that the new mach ne includes a suit- 77- seial 11 1 am. 1

diiterent positions for local application ofthe 1 sanding 01 slllGQthing'action] p AsIis customary in constructions of this general character; the machine is fitted an endless, horizontal sandingebelt or band 16 extending around Widely-spaced drums or pulleys 17 and 18, one of which is powerrotated by means not shown and one of'which is adjustable to permit the elimination of undue slack or looseness inthe polishing belt v 'The pressure head or shoe overlying the lower operative stretch of thesginding belt 1s supported and slidable lengthwise on a stationary round shaft 19 carried in'bearings- 5 2 1 at p si en s 01 th fr m l t the main-frame, the carr, ge for sueh shoe c o 1n prisi'ngattubnlarcast ng 22 through which the stationaryshaft loosely extends, the two,

enlarged end portions 23; 23 (of the nen ber 22ha s chambe s i .,'.atez iend o the casting, three, anti-fr ct on, pressure rollers 24 24L, 24 are mounted radially in .a

manner to CQntact with theshatt at points disposed 120 degrees apart, the opposite ends of the tubular element being closed by coverplates 25 25 centrally apertured to accom- Lllodatethe shaft. I

The bore of such sleeve 22 i'sslightly larger than the diameter of the shaftso that the sleeve is supported on the shaft solely by the rollers, which, because of their antifriction character, facilitate the bodily travel of the casting along the shaft, this result being el fected manually, as Will be explained here inatter. V, 7 r H A yokeflfi, having split or divided hearing ends 27, 27 with screws .28, 28 and revol'ubjly accon'nnodating the tubular inember 22 and precluded from moving endwise of the, casting by spaced, circular ribs 29, 29 integral with tl'ielnember 22 and located just inside of the yoke ends 27, 27, has upper and lower anti-friction rollers 31, 31 mounted on its back part and bearing on the corrc spending surfaces of a stationary flat bar mounted on the nslde of the longitudlnal bellow part-'33 of the ma n-frame connecting' the standards together to the rear of the abradant polishing or smoothing belt.- As thus joined together, the two members 22 and 26 constitute aunit readily reciprocable as a whole on the shaft 19, the tubular casting being capable of rocking movement around the axis of the shaft in its two bearings in the ends of the yoke.

Integral with such yoke ends are a pair of upstanding, forWardly-bent,spaced, supporting arms 34, 34, the tops of which'are pivotally connected at 35 to an intervening frame-like, top link 36, the front end of which 7 at 37 is pivotally joined to the upper part'ofa vertically-disposed frame 38, which, in turn,

is hingedat 39 to a forwardly'extended arm 41 inte ral with the central part of the oscillatory' s eeve or casting 22. y

The lengths between the centers and 37 and the axis of shafts 19 and 39 are equal, whereby this structure represents a parallelmotion mounting for the vertically-movable frame 38. v

Arm 41 has a handle43 adjustably mounted lengthwise thereon, such handle having a convenient operating knob 44 by which it may be easily manipulated, the sleeve 22 having an extension 45 carrying a catch-bar 46 adapted to coact with a leaf-springlatch 47 mounted on and projecting forwardly from a bar 48 constituting a part of the arms 34, so that, when the handle is elevated.,sufiiciently to carry the bar 46 beneath the latch 47, the latter will hold the handle and associated elements in such raised relation until the handle is purposelypulled down to release it. a

Frame 38, through which the handle 43 projects, as shown, at its lower end carries a pair of adjustable, opposed, spaced conical centers 49, 49 rockingly supporting a caring block 51'having an upright bearin 52 for the trunnion or journal 53 of a mem er 54 to which the appropriately-shaped felt-covered pressure-shoe 55 is rockingly hinged at 56 with regulating screws 57, 57011 opposite sides of the hinge, whereby the angular position of theshoe with respect to the axis of such transverse hinge may be adjustably fixed.

Block51 has opposite, outstanding, apertured, lateral cars 58, 58 loosely receiving a pair of screws 59, 59 threaded at their upper ends into tapped holes in registering pro]ections 61, 61 of the frame 38, coiled springs 62 encircling the screws and hearing at their low- 7 er ends on the knurled heads of the screws and at their upper ends on the under sides of the ears 58, 58.

This improved appliance is operated practically as follows The table or-carriage 12 having been adjusted to the correct height and the work 63 having been placed thereon, the operator, by

grasping the hand-rail 15 and moving the carriage back and forth as occasion requires,

and by holding the'knob 44 and thereby pushing the shoe 55 lengthwise along the shaft 19 and raising and lowering it, applying the needed degree of downward pressure thereon to secure the proper smoothin action of the abradant belt on the work, can nish or polish all parts or any portion of the top surface of the work in needed degree and with highly efficient results due in part, to the parallel motion mounting of the pressure shoe and to the associated mechanical instrumentalities.

'Although in this patent a single, present, referred embodimentof the invention has cen set forth in detail, those skilled in this art will readily understand that the invention is susceptible of other desirable embodiments and that many'mechanical changes may be incorporated in the structure presented without departure from the heart and essence of the invention as defined by the appended claims and without the sacrifice of any of its material benefits and advantages.

Although this invention has been described and claimed in connection with a sanding machine, it is to be understood that it is equally applicable to other kinds of abrading and polishing appliances and the claims are inchines.

I claim:

1. In a sanding-machine, the combination of a main-frame, a work-table reci rocatory thereon, a driven endlessabradantelt above said table, a stationary round shaftdispo'sed lenghwise of saidframe, a stationary bar arranged longitudinally of said frame, asleeve slidableaxiallyon said shaft andcapable of turning around the axis of said shaft, ayoke 2. In a sanding-machine,thecombination of a main-frame, a work-table reciprocator position of said thereon, a driven endless abrandant be t i above said table, a stationary roundshaft disposed lengthwise of said frame, a stationary bar arranged longitudinally of said frame, a

sleeveslidable axially on said shaft and ca pable of turning around the axis of said shaft, a plurality of radiallyarranged'rollers insaid sleeve contacting with said shaft at equallyspaced angular points, a yoke in which said sleeve may turn, means to cause said' sleeve and yoke tomove lengthwise as a unit, rollers on said yoke cooperating with; the upper and lower surfaces of said bar preventing turning 90 tended to embrace such other equivalent masaid link, an arm rigid with said sleeve and 5 hinged to said upright frame,an operatinghandle on said arm, and a pressure-shoe mounted on the lower part of said uprightframe, the mounting of said upright-frame constituting a parallel-motion construction confining the position of said frame to a ver- 10 tical relation.

In witness whereof I have hereunto set my hand.

EARL R. YOUNG, 

